Damien,

quoted

Fixes: 89d947561077 ("sd: Implement support for ZBC devices")
Cc: <redacted> # 4.19
Cc: <redacted> # 4.14
Signed-off-by: Masato Suzuki <redacted>

This bug exists since the beginning of SMR support in 4.10, until report
zones was changed to a device file method in kernel 4.20. It fell through
the cracks the entire time and was caught only recently with improvements
to our test suite.

Looks good to me. Obviously only applies to stable since, as you point
out, this code has been substantially reworked.

Acked-by: Martin K. Petersen <martin.petersen@oracle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering